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Noise refers to any external and unwanted information that interferes with a transmission signal. Noise can diminish transmission strength and disturb overall communication efficiency. In communications, noise can be created by radio waves, power lines, lightning and bad connections.
Techopedia Explains Noise
There are four main types of noise:
- Thermal noise, which is caused by conductor electron agitation and cannot be removed.
- Intermodulation noise, which is caused by non-linearity in communication devices.
- Cross-talk, which is often observed during phone conversations.
- Impulse noise, which is caused by analog signal interruptions, leading to data loss.
